I have started using in the last couple of months in Australia.have been getting somemreally good results mixing it with granulated soil wetter .even in the extremely dry weather we have had this season(spring nearly over coming iNto summer).if the acid level worries you I have read about using 3 parts lime to 1 part coffee grounds.to correct it. But have not had to do that yet. Best part about is getting is large quantities.